Surname ולקר (Welker 
, Velker 
, ולקר 
) , all over the world, is a common cognomen. The surname ולקר is habitual in Germany, where it is quite a rare surname, the United States, and Switzerland. Not in comparison with a country's population, it is commonest in the United States, Germany, and France. Much less frequently, ולקר is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Welker | Brazil, France, Canada, United States, Germany |
| Velker | Brazil, Romania, Canada, United States, Germany |
| ולקר | Israel |
|
יצחק ולקר IL (b. 1925) |
|
קלמן, רבקה, and שניאור זלמן